of vienna



Patented Nov. 8, 1927.

- UNITED STATES" "PATENT OFFICE".

JOHANN VOKAC, OF VIENNA, AUSTRIA, ASSIGNOR. TO E]:SENGIESSIEREI CARL LUBER &

SOHN, OF VIENNA, AUSTRIA, A COMPANY OF AUSTRIA.

' MAGAZINE AND SLOW-BURNING STOVE.

Application filed November 29, 1926, Serial No. 151,506, and in Austria September 21. 1926.

This invention relates to-improvements in magazineand slow-burning stoves of the kind in which in a fuel-shaft or magazine the fuel is at first distilled by an air-current admitted at the top end and the gases discharged through the magazine-grate are subjected to combustion outside the grate and subsequently the distilled fuel is subjected to complete combustion by an aircurrent admitted at the bottom'end.

The mode of supplying air to the stove is of the greatest importance for the proper working of the same. In case air of combustion is introduced at a few places only a kind of nozzle-action is produced also in large places and the fuel does not burn uniformly, but hollow spaces interrupting the combustion are the result of a quicker burning down of the fuel at those places, which.

are directly met by the air current. It has been found to be of advantage to introduce the air concentrically with the axis of the magazine through an adjustable circular opening. In order to prevent the gases from escaping through this opening in the case of a reduced draft it is necessary to pro-' vide a space round the circular opening for the reception of any accumulated gases, which extends upward from thesaid opening and from which these gases can pass into the chimney.

One mode of carrying out the present invention is illustrated by way of example on the accompanying sheet of drawings in which:

Fig. 1 shows a tion, and

Fig. 2 is -a perspective View of a detail stove in sectional elevav constructed according to'the invention.

The fuel-receptacleor magazine 7 is vertically arranged in a shell or casing 1 and a distillation-grate 11 of semi-spherical shape is attached to the bottom end of the former.

An inner casing 17, disposed underneath the magazine 7 is provided with a. plane grate l5 and fresh air can .be supplied to the bot tom side of the latter by way of an adjustable openingfi in the door 5. The. top end of the stove is closed by a cover 24, provided with an adjustable opening for the supply of air from the top during the period of distillation, the burnt gases being discharged by way of the chimney-pipe 2. After the distillation has taken place air, which is heated by the hot lower portion of the stove, is supplied from the bottom, while the gases of combustion now generated are passed oif by way of the chimney-pipe 29, which establishes communication between the cover 24 and the chimney. The direction of the draft can be reversed by operating dampers 3a and 35, disposed'in the chimney-pipes 29 and 2 respectively and mounted on a common shaft 32 in such a manner, that they are displaced at 90 de grees with respect to each other.

The top end of the stove is closed bythe cover 24, provided with a hopper 25, which is centrally disposed above the magazine of the stove and concentrically with respect to The following arrangement serves for regulating-the air-supply opening between the mouth of the hopper and member 26 The member 26 is suspended from the perforated lid 37 of the hopper by means of a rod 36, passing through the said lid. In the middle of the lid are centrally disposed the dish-shaped three pairs of steps 38. 38", 38" of diifer- V out height, the two steps of each pair being disposed diametrically opposite each other and are of the like height. A cross member 38, secured to the rod, rests on opposite steps. The dish-shaped member 26 can be suspended from the desired pair of steps by lifting and rotating the former by means of a knob secured to the rod 36, so that the annular clearance can be adjusted according to requirement or fully closed. In order to charge the stove it is necessary to remove the dish-shaped member and the lid.

' The diameter ofthe upper chimney-pipe 29 is smaller than the diameter of the bottom may easily burst owing to the irregular distribution of the heat stresses. According to the present invention this danger is avoided in that the shell or casing consists of two parts, which are united by a joint 39 substantially in the height of the flange of the basket-shaped grate.

I claim:

1. A magazineand slow-burning stove comprising in combination a casing, a Clllll't ney-pipe at the top, a chimney-pipe at the bottom, a damper mounted in each pipe, an air-supply means in the lower part of the stove, a hopper centrally disposed with respect to the magazine, a perforated lid for the hopper, a dish-shaped member for clos ing the discharge opening of the hopper, and

means for adjusting the dish-shaped membet with respect to the hopper, for the purpose specified.

2. A magazine and slow-burning stove rod, for the purpose specified.

3. A magazineand slow-burning stove according to claim 1, in which the chimneypipe at the top and its damper are smaller than the chimney-pipe at the bottom and its dampen.

4. A magazineand slow-burning stove according to claim 1, in which the casing consists of two parts which are united by a horizontal joint.

In testimony whereof I aflix my signature.

J OHANN VOKAU. 

